Error code reference
Bosch Oven Error Code E118
Cavity 1 (upper/single) cooling fan supervision error
Cavity 1 (upper/single) cooling fan supervision error — fan speed is too low or too high.
First step from the service manual
Refer to Diagram 2/4. Ensure wire harness not touching motor or pinched. Confirm plenum not touching fan end cap. Check Hall Effect Sensor connection.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
- Verified part numbers when replacement is required
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